Poison ivy: The itchiness is from inflammation of the skin or contact dermatitis at the area of exposure to the oily resin called urushiol. It's the oily substance from the leaves or stems.
Answered 1/6/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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